Reactive consolidation of tough, deformation resistant tantalum monoboride

Demirskyi, Dmytro; Yoshimi, Kyosuke; Suzuki, Tohru; Vasylkiv, Oleg

doi:10.1016/j.scriptamat.2023.115383

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Additionally, a recent study of the flexural strength of tantalum monoboride 8 also indicated that plastic deformation only occurs above 1800°C. These findings suggest that the resistance to deformation at elevated temperatures for the tantalum borides may be superior to other diborides.…”

Section: Resultsmentioning

confidence: 99%

“…Other tantalum-based UHTCs, such as TaC, 6 TaN, 7 or TaB, 8 have exhibited diverse trends in the relationship between the flexural strength and temperature. However, a common observation is that the flexural strength up to 1600 • C is expected to be comparable to that at room temperature, which contradicts the findings of Licheri et al 4 Based on this information, the objective of the present study was to prepare tantalum diboride specimens using…”

Section: Introductionmentioning

confidence: 99%

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High‐temperature strength behavior of tantalum diboride to 2000°C

Vasylkiv

Demirskyi

2023

J Am Ceram Soc.

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This study investigated the high‐temperature strength of spark plasma sintered tantalum diboride (TaB2) for the first time. TaB2 exhibited a unique elastic fracture behavior below 1900°C, unlike other transition metal diborides. The consolidation process involved spark plasma sintering at 2000–2200°C yielding dense TaB2 samples. The flexural strength was measured at elevated temperatures up to 2000°C, showing a quite high flexural strength of 400 ± 20 MPa at 1900°C. These findings provide valuable insights into the high‐temperature behavior of TaB2, highlighting its potential for advanced applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐temperature strength behavior of tantalum diboride to 2000°C

Vasylkiv

Demirskyi

2023

J Am Ceram Soc.

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High bending strength at 1800 °C exceeding 1 GPa in TiB2-B4C composite

Kuncser¹,

Vasylkiv²,

Borodianska³

et al. 2023

Sci Rep

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High density (99.5%) ceramic composite composed of titanium boride and boron carbide (70/30 vol%) was obtained by spark plasma sintering and was tested by 3-point bending test in Ar atmosphere at 1800 °C. Bending strength was high, around 1.1 GPa. The strength–strain curve presents a peculiar shape composed of three regions where elastic and plastic deformations are active with a different weight. Based on transmission electron microscopy observations we propose a process of mechanical energy absorption driven by shear stress in the boron carbide crystals: stacking faults with (1-11) and (011) stacking planes and twins with (1-11) twinning plane rearrange into nano-twins with (10-1) twinning planes, orthogonal but equivalent to the initial ones. This rearrangement mechanism provides in the first instance a plastic signature, but further contributes strengthening.

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Reactive consolidation of tough, deformation resistant tantalum monoboride

Cited by 2 publications

References 15 publications

High‐temperature strength behavior of tantalum diboride to 2000°C

High‐temperature strength behavior of tantalum diboride to 2000°C

High bending strength at 1800 °C exceeding 1 GPa in TiB2-B4C composite

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